/*
 * ByteSetter.java
 * 
 * PostGIS extension for PostgreSQL JDBC driver - Binary Parser
 * 
 * (C) 2005 Markus Schaber, markus.schaber@logix-tt.com
 *
 * (C) 2015 Phillip Ross, phillip.w.g.ross@gmail.com
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 */

package net.postgis.jdbc.geometry.binary;

public abstract class ByteSetter {

    /**
     * Set a byte.
     *
     * @param b byte value to set with
     * @param index index to set
     */
    public abstract void set(byte b, int index);

    public static class BinaryByteSetter extends ByteSetter {
        private byte[] array;

        public BinaryByteSetter(int length) {
            this.array = new byte[length];
        }

        public void set(byte b, int index) {
            array[index] = b; // mask out sign-extended bits.
        }

        public byte[] result() {
            return array;
        }
        
        public String toString() {
            char[] arr = new char[array.length];
            for (int i=0; i<array.length; i++) {
                arr[i] = (char)(array[i]&0xFF);
            }
            return new String(arr);
        }
    }

    public static class StringByteSetter extends ByteSetter {
        protected static final char[] hextypes = "0123456789ABCDEF".toCharArray();
        private char[] rep;

        public StringByteSetter(int length) {
            this.rep = new char[length * 2];
        }

        public void set(byte b, int index) {
            index *= 2;
            rep[index] = hextypes[(b >>> 4) & 0xF];
            rep[index + 1] = hextypes[b & 0xF];
        }

        public char[] resultAsArray() {
            return rep;
        }

        public String result() {
            return new String(rep);
        }
        
        public String toString() {
            return new String(rep);
        }
    }
}
